Sensitive-material-marking device



1. P. BETHKE,

SENSITIVE MATERIAL MARKING DEVICE.-

APPLICATION man MAY I0, m5.

1,374,875. Patented Apr. 12, 1921.

UNITED STATES PATENT OFFICE.

JOHN P. BETHKE, OF HIL'WAUK EE, WISCONSIN, AS SIGNOR F ONE-HALF TO LOUIS SCHLESINGER, OF MILWAUKEE, WISCONSIN.

To all whom it may concern:

Be it known that 1, Joint P. BETHKE, a citizen of the United States, and resident of Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented new and useful 'Im rovements in Sensitive-Material-Marking evices, of which the following is a description, reference being had to the accompanying drawings, which are a part of this specification. v

This invention relates to improvements in sensitive material marking devices.

In cameras now on the market which are provided with sensitive material marking devices it is necessary to provide special film rolls having extra rolls of prepared paper and to use special pencils in marking the portions of the film or sensitive material.

As only three or four inches of the five foot lengths of film are actually used for writing it will be seen that the greater part of the prepared paper is wasted.

It is one of the objects of the present invention to overcome the before mentioned objectionable features and provide a sensitive material marking device which may be used in connection wlth the ordinary photographic film rolls without requiring any special preparation thereof.

A further object of the invention is to provide a sensitive material marking device in which a phosphorescent or luminous material is utilized for printing writing di.

rectly upon the film while the film is in the camera.

A further object of the invention is to provide a sensitive material marking device in which the writing, when printed from the Iflegative, is indark lines upon a light surace.

A further object of the invention is to provide a sensitive material marking device which may be easily attached to cameras now on the market.

A further object of the invention is to provide a sensitive material marking device which is of simple construction, is strong and durable and is well adapted for the purpose desired. z

With the above and other objects in. view the invention consists of the improved. sensitive material marking device and its parts and combinations as set forth in the claims, and all equivalents thereof.

In the accompanying drawing in which v Specification of Letters Patent. Patented AIlI. 12, 1921.

Application filed May 10, 1915. Serial No. 27,031.

the same reference characters indicate the same -parts in all of the views:

Figure 1 is a side view of a camera provided with the improved sensitive material marking device, portions of the camera being broken away to show interior construction;

Fig. 2 is a rear view of a portion thereof, parts broken away to show interior construction and portions of the device being shown as artly-withdrawn from the camera;

1g. 3 is a side view of a piece ofdeveloped film or negative made with the improved device;

F ig. 4 is a side view of a portion of a 70,

pridnt made from the improved negative; an Fig. 5 is an enlarged transverse sectional detail View of the device shown in connection with a portion of the film.

Referring to the drawing the numeral 5 indicates the camera case of an ordinary folding camera, 6 the bellows, 7 the lens casing, 8' the spools, and 9 the sensitive mav terial film or negative sheet which is unrolled from one spool and wound on the other. The spools are also provided with a protecting roll of black paper 10 which is mounted on the spools and moves with the film on the outer side thereof. The sensitive material or film marking device 11 consists of an elongated box or casing 12 having an open side 13 covered by a slidable' cover 14. The cover has its side edge portions 15 bent over to engage the flanged side edge portions 16 of the box and form a light proof closure therefor. v

The elongated box is mounted within the lower portion of the camera casing and extends transversely across and adjacent to the inner face of the rear wall of the camera, casing, with the side opening facing the rear wall of the camera casing. The sensitized film 9 and its backing of black paper 10 travel between the box 12 and the-rear wall of the camera casing, and a bed of material 17 mounted on the rear camera wall adjacent the box serves to cause the film to travel closely to the cover of the box. One end of the cover 14: of the box projects through one side portion of the camera case and is prvided with a bent end portion 18 so that said cover may be easily engaged and pulled outwardly to open the box.

' -Within the box is positioned an elongated piece of transparent or translucent material 19 which may be written upon as indicated in Fig. 2 with a lead pencil or other marking device. Preferably I use a strip of glass havin its outer face 20 ground or frosted as in icated in Fig. 2 to permit writing thereon with an ordinary lead pencil, and which writing may be easily removed with a rubber eraser. While Ipreferably use ground glass the same results may be obtained by the use of celluloid or other like material. 1

The inner face of the glass is coated with a luminous paint 21 or other material which will give or radiate light and act upon the sensitized film or material when within the box and the box cover is in open position.

The elongated writing strip, or in substance a positive, occupies substantially the entire space within the box and one end 19' projects from the same side of the camera casing as the box cover and may be pulled outwardly from the box and'the casing as indicated in Fig. 2.

WVhile no special means have been shown or described for forming light proof joints between the camera casing and the slidable box cover and writing medium it is to be understood that all joints may be made light proof in any manner desired.

In operation the picture is taken in the ordinary manner and as the lower portion of the film is covered by the marking device the said portion will notbe exposed. After the picture has been taken the ground glass or positive is withdrawn from the side of the camera casing a suflicient distance to permit the user to write the nameand date or other data upon the ground surface of the glass or other material with an ordinary lead pencil and while writing, the luminous paint on the opposite side of the glass will be exposed to and absorb light. When the writing is completed the positive is pushed into the camera casing again and the box cover is pulled out a sufficient distance to uncover the writing for two or three seconds. lVhile the cover is in open position the light from the luminous paint will shine through the glass and upon the portion of the film in front of the glass which is not covered by the writing. This exposure will, after the film is developed, reproduce the writing in transparent lines on a dark back ground as shown in Fig. 3 and in printing from the film or negative the writing will be reproduced in positive form or black upon a white back ground as shown in Fig. 4.

While the invention for convenience is illustrated and described in the manner shown, it is to be understood that the construction may be modified in many ways seen that the invention is of very simple construction and is well adapted for the purpose described.

What I claim as my invention is:

1. The combination with a camera, of a sensitive material marking device therefor, comprising a medium positioned adjacent to the sensitive material in the camera and having a writing surface and a luminous portion, said writing surface being interposed between the sensitive material and the luminous portion, and means for controlling the exposure of the sensitive material to the action of rays emanating from the luminous portion of said medium.

2. The combination with a camera, of a sensitive material marking device therefor, comprising a medium positioned within the camera and adjacent to the sensitive material in the camera and having a writing surface and a luminous portion, said writing surface being interposed between the sensitive material and the luminous portion, and means for controlling the exposure of the sensitive material to the action of rays emanating from the luminous portion of said medium,

3. The combination with a camera, of a sensitive material marking device therefor, comprising an inclosing casing within the camera and having an open side with a movable cover, said casing having its open side facing the sensitive material, and a removable medium positioned within the casing and having a writing surface and luminous portion for reproducing the writing on the medium upon the sensitive material within the camera, the writing surface being interposed betaveen the luminous material and the sensitive material.

4. The combination with a camera, of a sensitive material marking device therefor, comprising a member removably positioned within the camera and adjacent to the sensitized face 30f the sensitive material and having a luminous portion and a surface adapted to have characters written thereon, and means for controlling the exposure of the portion of the sensitive material adjacent the removable member, while said member is within the camera, to the action of rays of light other than the rays passing through the lens proper of the camera for reproducing on the sensitive material the characters written upon the member.

5. The combination with a camera, of a sensitive material marking device therefor, comprising a member removably positioned within the camera and adjacent to the sensitized face of the sensitive material and having a luminous portion and surface adapted to have characters written thereon while said member is withdrawn from the camera, and means for controlling the exposure of the writing surface, while within the camera,

and the sensitivematerial adjacent thereto to rays of light, other than the rays passing through. the lens proper of the camera, emanating from a source of supply to repro- J duce on the negative the characters written the camera, said member having a luminous I portion and a surface between the luminous portion and the sensitive material which may be written upon when withdrawn from the' casing and alsohaving a luminous portion the rays of light of which will cause a change in the sensitive material and reproduce thereon the written characters on the member when said member is within the casing and the cover thereof has been moved to open position for a predetermined length of time.

7. The combination with a camera, of a sensitive material marking device therefor, comprising a casing within the camera having an open side adjacent to the face of the sensitive material, a cover for said open side which may be withdrawn through the camera to open position, a member within the casing and removable therefrom through the camera, said member"having a surface on one side which may be written upon when withdrawn from the casing and also having a luminous coating upon its opposite side the rays of light of which will shine through the member and cause a change in the sensitive material and reproduce thereon the written characters on the member when said member is within the casing and the cover thereof has been moved to open position for a predetermined length of .time.

8. A sensitive material marking device, comprising a casing having an open side and a cover, and a writing member within the casing and having a writing surface and a luminous portion, the writing surface facing the open side of the casing.

9. A -sensitive material marking device,

comprising a casing having an 0 en side and a slidable cover therefor, an a comcomprising a box like casing having an open side and a slidable cover therefor, and a strip of glass having one of 1ts sides ground and a coating of luminous material upon another side, the ground side of the glass facing the open side of the casing.

11. The combination with a camera, of a sensitive material marking device therefor, comprising a member positioned adjacent to the sensitive material in the camera and provided with a writing surface, a luminous means positioned adjacent to the member the rays of light of which will cause a ,change in the sensitive material and repro duce thereon the characters written on the surface of the member interposed between the lumlnous means and the sens1t1ve material, and means controlling the exposure of the sensitive material to the light rays of the luminous means.

12. A sensitive material marking'device,

comprising a casing having an open side and a movable cover, a member within the casing and provided with a writing surface facing the open side of the casing, and a luminous means positioned within the easing and between the writing surface member and the casing. I

13. The combination with a camera, of a sensitive material marking device therefor, comprising means within the camera for comfining a portion of the sensitive material from the rays of light admitted through the lens of the camera, other means for emitting and exposing the confined portion of the sensitive material to rays of light, and a writing surface member movable to a position to permit writing on the surface thereof and also movable to a position within the casing of the camera and adjacent to the sensitive material to have writing thereon intercept the rays of light from the light-emitting means to which the confined portion of the sensitive material is exposed.

14. The combination of a container for sensitized sheets and means for marking a contained sensitized sheet with desired data, said means comprising a member having a data-receiving position and a data-impartingposition and adapted to be wrltten on when in receiving position by the operator and adapted when in imparting position to affect said sensitized sheet, said member being provided with a medium which, when said member is in data-receiving position, will store potential radiant. energy to be later used to produce luminosity when in imparting position.

15. The combination with a camera having a sensitized'element therein, of a luminous composition element mounted within said camera, and means for holding the same in operative relationship with said sensitized element to expose the latter to said luminous compositionelement, the combination including an element provided with a surface for the reception of opaque characters for intercepting certain rays of light from said luminous composition element to said sensitized element to autograph the latter. 4

16. The combination with a camera having a sensitized element therein, of a luminous composition element mounted w1th1n said camera, means for holding the same in operative relationship with said sensitized element to expose the latter to said luminous composition element, said luminous element including a light transmitting element adapted for the reception of opaque characters to block the transmission of certain of the emitted rays of light to said sensitized element.

17. The combination with a camera having a sensitized element therein, of a luminous composition el'ement removably mounted within said camera, andmeans for holding the same in operative relationship with said sensitized element to expose the latter to said luminous composition element, the combination including an element provided with a surface for the reception of opaque characters for intercepting certain rays of light from said luminous composition element to said sensitized element to autograph the latter.

18. The combination with a camera having a sensitized element therein, of a support within said camera provided with an opening adjacent said sensitized element, and a luminous element removably mounted in said support opposite the position of said opening so as to expose said sensitized element to said luminous element;

19. The combination with a camera provided with a sensitized element therein, of a support within said camera provided with an opening adjacent said sensltized element, a luminous element removably mounted in said support at the side thereof having said opening to expose said sensitized element to said luminous element, and a removable slide for preventing such exposure.

20. As an article of manufacture, for use in a camera, a carrier containing a luminous substance, said carrier being provided with a light transmitting surface adapted for the reception of erasable opaque characters to block the transmission of certain rays of light from said luminous substance.

21. In an autographic camera, the combination with a camera having a sensitized element therein and an opening in one of its walls adjacent said element, of a lumi nous element, and means permitting of the projection of the luminous element through nation, with a camera havin said opening directly into printing position adjacent said sensitized element.

22. In an autographic camera, the combination, with a camera having a sensitized element therein and an opening in one of its walls adjacent said element, of supporting uide means, and a luminouselement slidably mounted in said opening and upon said guide means and movable into and out of printing position adjacent said sensitized element. p

23. In an autographic camera, the combination, with a camera having a sensitized element therein and an opening in one of the walls of the camera in line with the space in the camera in front of the sensitized element, of a luminous element slidably mounted in said opening and movable directly into printing position in said space to expose said sensitized element to said luminous element, and means for guiding said luminous element into and out'of printing position.

24:. In an autographic camera, the combia sensitized element therein and an .openln in one of its walls in a plane parallel to t e plane of the sensitized element and adjacent thereto, of a guide means, and a slide having a translucid writing surface adapted to be disposed adjacent the sensitized element and a luminous surface behind said translucid surface to expose said sensitized element to the data upon said writing surface, said slide being movable in said opening and upon said guide means into and out of printing position.

25. The combination with a camera having a sensitized element therein, of a support within said camera, and a luminous inscription bearing element movable in said support into a position to expose saidsensitized element to said luminous element.

26. The combination with a camera having a sensitized element therein, of a support within said camera, and a luminous inscription bearing element movable relatively to said support into a position to expose said sensitized element to the luminosity of said luminous element.

27 In a camera having a sensitized ele-" ment therein, the combination with a supporting guide, of a luminous inscription 

